The last-minute victory was their third in all competitions since September.

Saints centre Luther Burrell misses the game with an ankle injury and is replaced by Stephenson in the midfield.

Day comes into the second row alongside Api Ratuniyarawa, while Courtney Lawes shifts to blindside flanker.

“It’s definitely not a dead rubber – we’ve got to do this for our own benefit, the benefit of people around us and the supporters,” Northampton technical coaching consultant Alan Gaffney told BBC Radio Northampton.

Remi Lamerat and Benjamin Kayser return for Top 14 side Clermont.

Clermont coach Franck Azema said: “We are at the top of the pool and have the opportunity to go for qualifying this week. This is part of the club’s goals and it would be a good thing to validate it as soon as possible.”

The unbeaten French side lead Pool 2 with 18 points, ahead of second-place Ospreys on 13 points and Saracens on 11 points – who play each other on Saturday.